GCF for 12, 18 and 26

"Greatest Common Factor of 3 Numbers" Calculator

What's the Greatest Common Factor (GCF) of 12, 18 and 26?

Answer

GCF of 12, 18 and 26 is

Common factors: 1, 2

2 divides all three: 12 ÷ 2 = 6, 18 ÷ 2 = 9, 26 ÷ 2 = 13 — and 6, 9 and 13 have no factor but 1 common to all of them, so no larger number divides all three.

12 = 2² × 3

18 = 2 × 3²

26 = 2 × 13

Prime	12	18	26	Lowest power
2	2²	2	2	2
3	3	3²	—	—
13	—	—	13	—

— = power 0: the prime is not a factor of this number, so it cannot be in the GCF.

GCF = 2

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Related Calculations

GCF Table

1st	2nd	3rd	GCF
11	12	18	1
12	12	18	6
12	13	18	1
12	14	18	2
12	15	18	3
12	16	18	2
12	17	18	1
12	18	18	6
12	18	19	1
12	18	20	2
12	18	21	3
12	18	22	2
12	18	23	1
12	18	24	6
12	18	25	1
12	18	26	2
12	18	27	3
12	18	28	2
12	18	29	1
12	18	30	6
12	18	31	1
12	18	32	2
12	18	33	3
12	18	34	2
12	18	35	1
12	18	36	6
12	18	37	1
12	18	38	2
12	18	39	3
12	18	40	2

FAQ

What's the Greatest Common Factor (GCF) of 12, 18 and 26?

GCF of 12, 18 and 26 is 2

What prime factors do 12, 18 and 26 share?

All three factorizations contain 2, and multiplying those shared primes gives 2 — exactly the greatest common factor.

Can you get the GCF of 12, 18 and 26 two numbers at a time?

Yes. The GCF of 12 and 18 is 6, and the GCF of 6 and 26 is 2 — the same answer, because the greatest common factor is associative and does not depend on the order of the three numbers.

How does the GCF simplify the ratio 12 : 18 : 26?

Divide every term by the GCF 2: 12 ÷ 2 = 6, 18 ÷ 2 = 9 and 26 ÷ 2 = 13. So 12 : 18 : 26 in lowest terms is 6 : 9 : 13, and no whole number other than 1 divides all three of those.

GCF for 12, 18 and 26

What's the Greatest Common Factor (GCF) of 12, 18 and 26?

More with these numbers

Related Calculations

See Also

GCF Table

FAQ

What's the Greatest Common Factor (GCF) of 12, 18 and 26?

What prime factors do 12, 18 and 26 share?

Can you get the GCF of 12, 18 and 26 two numbers at a time?

How does the GCF simplify the ratio 12 : 18 : 26?

See Also

1st	2nd	3rd	GCF
11	12	18	1
12	12	18	6
12	13	18	1
12	14	18	2
12	15	18	3
12	16	18	2
12	17	18	1
12	18	18	6
12	18	19	1
12	18	20	2
12	18	21	3
12	18	22	2
12	18	23	1
12	18	24	6
12	18	25	1
12	18	26	2
12	18	27	3
12	18	28	2
12	18	29	1
12	18	30	6
12	18	31	1
12	18	32	2
12	18	33	3
12	18	34	2
12	18	35	1
12	18	36	6
12	18	37	1
12	18	38	2
12	18	39	3
12	18	40	2

1st	2nd	3rd	GCF
11	12	18	1
12	12	18	6
12	13	18	1
12	14	18	2
12	15	18	3
12	16	18	2
12	17	18	1
12	18	18	6
12	18	19	1
12	18	20	2
12	18	21	3
12	18	22	2
12	18	23	1
12	18	24	6
12	18	25	1
12	18	26	2
12	18	27	3
12	18	28	2
12	18	29	1
12	18	30	6
12	18	31	1
12	18	32	2
12	18	33	3
12	18	34	2
12	18	35	1
12	18	36	6
12	18	37	1
12	18	38	2
12	18	39	3
12	18	40	2

1st	2nd	3rd	GCF
11	12	18	1
12	12	18	6
12	13	18	1
12	14	18	2
12	15	18	3
12	16	18	2
12	17	18	1
12	18	18	6
12	18	19	1
12	18	20	2
12	18	21	3
12	18	22	2
12	18	23	1
12	18	24	6
12	18	25	1
12	18	26	2
12	18	27	3
12	18	28	2
12	18	29	1
12	18	30	6
12	18	31	1
12	18	32	2
12	18	33	3
12	18	34	2
12	18	35	1
12	18	36	6
12	18	37	1
12	18	38	2
12	18	39	3
12	18	40	2